2746-59-0Relevant articles and documents
Solvatochromic triazaborolopyridinium probes toward ultra-sensitive trace water detection in organic solvents
Chansaenpak, Kantapat,Namuangruk, Supawadee,Nootem, Jukkrit,Rashatasakhon, Paitoon,Sattayanon, Chanchai,Tumcharern, Gamolwan,Wattanathana, Worawat
, (2020/07/06)
A series of triazaborolopyridiniums (TBP) has been synthesized by varying electron-tunning substituents. The TBP derivatives with electron-withdrawing groups, including cyano, and nitro moieties, exhibited solvatochromic properties due to the internal cha
Synthesis of 1,2,4-Triazolo[4,3-a]pyridines and Related Heterocycles by Sequential Condensation and Iodine-Mediated Oxidative Cyclization
Li, Ertong,Hu, Zhiyuan,Song, Lina,Yu, Wenquan,Chang, Junbiao
, p. 11022 - 11027 (2016/07/27)
A facile and efficient approach to access 1,2,4-triazolo[4,3-a]pyridines and related heterocycles has been accomplished through condensation of readily available aryl hydrazines with corresponding aldehydes followed by iodine-mediated oxidative cyclizatio
Toward Hypoxia-Selective Rhenium and Technetium Tricarbonyl Complexes
North, Andrea J.,Hayne, David J.,Schieber, Christine,Price, Katherine,White, Anthony R.,Crouch, Peter J.,Rigopoulos, Angela,OKeefe, Graeme J.,Tochon-Danguy, Henri,Scott, Andrew M.,White, Jonathan M.,Ackermann, Uwe,Donnelly, Paul S.
, p. 9594 - 9610 (2015/10/12)
With the aim of preparing hypoxia-selective imaging and therapeutic agents, technetium(I) and rhenium(I) tricarbonyl complexes with pyridylhydrazone, dipyridylamine, and pyridylaminocarboxylate ligands containing nitrobenzyl or nitroimidazole functional g
Efficient synthesis of 3-substituted 1,2,4-triazolo[4,3-a]pyridine by [bis(trifluroacetoxy)iodo]benzene-catalyzed oxidative intramolecular cyclization of heterocyclic hydrazones
Padalkar, Vikas S.,Patil, Vikas S.,Phatangare, Kiran R.,Umape, Prashant G.,Sekar
experimental part, p. 925 - 938 (2011/04/22)
A series of 1,2,4-triazolopyridines have been prepared by oxidative intramolecular cyclization of heterocyclic hydrazones with [bis(trifluroacetoxy) iodo]benzene. General applicability of this simple transformation was confirmed by synthesis of 1,2,4-triazolo[4,3-a]pyridine. The advantages of this protocol are the nontoxicity of catalyst and shorter reaction time to obtain good preparative yield.
Palladium-catalyzed coupling of aldehyde-derived hydrazones: Practical synthesis of triazolopyridines and related heterocycles
Thiel, Oliver R.,Achmatowicz, Michal M.,Reichelt, Andreas,Larsen, Robert D.
supporting information; experimental part, p. 8395 - 8398 (2010/12/25)
The palladium-catalyzed intermolecular coupling of aldehyde-derived hydrazones with chloroazines, followed by oxidative cyclization under mild conditions afforded access to a broad variety of bicyclic heterocyclic scaffolds (see scheme) that have potentia
Electrochemical Synthesis of Heterocyclic Compounds. XV. Anodic Synthesis of s-Triazolopyridine Derivatives
Crljenak, Senka,Tabakovic, Ibro,Jeremic, Dragoslav,Gaon, Igor
, p. 527 - 536 (2007/10/02)
Anodic oxidation of several heterocyclic hydrazones (1a - 9a) prepared from 2-hydrazinopyridine of 2-hydrazino-4-nitropyridine and the corresponding aromatic aldehyde was performed in a CH3CN-Et4NClO4 solution with the addition of 60percent HClO4 on a platinum electrode, using controlled potentials.As a result of two-electron oxidative cyclizations, several s-triazolopyridine derivatives (1b - 9b) were prepared in yields ranging from 55 to 92percent.A mechanism rationalizing the formation of the 3-phenyl-s-triazolopyridine, 1b, has been studied by LSV, CPSV, RDE, coulometry and preparative scale electrolysis.
